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Across
  1. 5. every atom has one
  2. 6. what does a electron do when it goes from a higher energy level to a lower one
  3. 10. what is made of neutrons and protons
  4. 11. unstable isotopes are commonly called ____ (put a dash between)
  5. 14. what is the atomic number of argon
  6. 17. basic unit of a chemical unit
  7. 18. positively charged atoms with less electrons then protons
  8. 19. What is Y representing on the periodic table
  9. 25. What is Dy representing on the periodic table
  10. 26. amplitude
  11. 27. what is the atomic number for sodium
  12. 30. what is H representing on the periodic table
  13. 31. each element of the periodic table is represented by a ____
  14. 33. displays wavelength and frequency (put a dash)
  15. 38. atoms are made up of how many subatomic particles?
  16. 40. neutral atoms have zero ___
  17. 41. Negatively charged atoms with more electrons then protons
  18. 44. what is the atomic number for Zinc (write it out)
  19. 45. adds negative charge to an atom
Down
  1. 1. what is O representing on the periodic table
  2. 2. what state are valence electrons most common in (put a dash)
  3. 3. What is the atomic number of Fermium
  4. 4. What is Po representing on the periodic table
  5. 7. what is S representing on the periodic table
  6. 8. what is Zn representing on the periodic table
  7. 9. the amount of waves per second is called ___
  8. 12. What is the atomic number for ytterbium
  9. 13. what is Na representing on the periodic table
  10. 15. the straight line that goes through the center of the circle is the ___
  11. 16. minimum amount of energy that can be gained or lost from an atom
  12. 20. what is Ti representing on the periodic table
  13. 21. a shell that can hold electrons
  14. 22. elements of an atom with same number of protons but different amount of neutrons
  15. 23. What is Pb representing on the periodic table
  16. 24. What is the atomic number for magnesium
  17. 28. atoms absorb energy and become excited
  18. 29. gives a positive charge to a atom
  19. 32. what is the atomic number of Zirconium
  20. 34. what absorbs energy from a flame when the substance is heated
  21. 35. what is I representing on the periodic table
  22. 36. What is Ca representing on the periodic table
  23. 37. What is Rn representing on the periodic table
  24. 39. atoms are mostly ____ (put a dash in between the words)
  25. 42. atoms are made of what kind of particles
  26. 43. adds mass to an atom but no charge